scholarly journals CALONECTRIS BOREALIS (AVES, PROCELLARIIDAE) COMO UN REGISTRO NUEVO PARA DOS ESPECIES DE NEMÁTODOS EN BRASIL

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Melissa Q. Cárdenas ◽  
Simone C. Cohen ◽  
Priscila A. Fernandes ◽  
Berenice M. M. Fernandes
Keyword(s):  
Calonectris Borealis

Contracaecum pelagicum Johnston & Mawson, 1942 y Seuratia shipleyi (Stossich, 1900) están registrados en Brasil parasitando Calonectris borealis (Cory, 1881), que es un nuevo huésped para ambas especies. Se presentam las principales medidas de estas especies en el nuevo huésped.

scholarly journals Acuariidae (Nematoda) in Procellariiformes (Aves) on the southern coast of Rio Grande do Sul, Brazil

2018 ◽  
Vol 27 (1) ◽  
pp. 7-11
Author(s):  
Camila Costa Schramm ◽  
Carolina Silveira Mascarenhas ◽  
Silvia Bainy Gastal ◽  
Simone Scheer ◽  
Gertrud Müller ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Rio Grande ◽  
Southern Coast ◽  
Rio Grande Do Sul ◽  
Aquatic Birds ◽  
Diomedea Exulans ◽  
Procellaria Aequinoctialis ◽  
Calonectris Borealis ◽  
First Time

Abstract Acuariidae nematodes are normally found in the digestive tract of aquatic birds, including Procellariiformes. Were examined Calonectris borealis (n = 4), Diomedea exulans (n = 1), Macronectes giganteus (n = 8), Thalassarche chlororhynchos (n = 5), Thalassarche melanophrys (n = 15), Procellaria aequinoctialis (n = 4), Puffinus gravis (n = 2) and Puffinus puffinus (n = 6), collected on the southern coast of RS, Brazil. A total of 16 birds (35.5%) were parasitized by two species of Acuariidae. Stegophorus diomedeae and Seuratia shipleyi were identified, with prevalences of 26.1% and 21.7%, respectively. Few studies on nematodes in Procellariiformes have been conducted. Here, the acuariids Seuratia shipleyi in Calonectris borealis and Procellaria aequinoctialis and Stegophorus diomedeae in Diomedea exulans, Procellaria aequinoctialis and Thalassarche chlororhynchos were reported for the first time.

scholarly journals Pelagic seabird flight patterns are consistent with a reliance on olfactory maps for oceanic navigation

2015 ◽  
Vol 282 (1811) ◽  
pp. 20150468 ◽  
Author(s):  
Andrew M. Reynolds ◽  
Jacopo G. Cecere ◽  
Vitor H. Paiva ◽  
Jaime A. Ramos ◽  
Stefano Focardi
Keyword(s):  
Atlantic Ocean ◽  
North Atlantic Ocean ◽  
Movement Ecology ◽  
Wild Birds ◽  
Olfactory Cues ◽  
Invasive Approach ◽  
Scale Free ◽  
Non Invasive ◽  
Calonectris Borealis ◽  
Central Atlantic

Homing studies have provided tantalizing evidence that the remarkable ability of shearwaters ( Procellariiformes ) to pinpoint their breeding colony after crossing vast expanses of featureless open ocean can be attributed to their assembling cognitive maps of wind-borne odours but crucially, it has not been tested whether olfactory cues are actually used as a system for navigation. Obtaining statistically important samples of wild birds for use in experimental approaches is, however, impossible because of invasive sensory manipulation. Using an innovative non-invasive approach, we provide strong evidence that shearwaters rely on olfactory cues for oceanic navigation. We tested for compliance with olfactory-cued navigation in the flight patterns of 210 shearwaters of three species (Cory's shearwaters, Calonectris borealis , North Atlantic Ocean, Scopoli's shearwaters, C. diomedea Mediterranean Sea, and Cape Verde shearwaters, C. edwardsii , Central Atlantic Ocean) tagged with high-resolution GPS loggers during both incubation and chick rearing. We found that most (69%) birds displayed exponentially truncated scale-free (Lévy-flight like) displacements, which we show are consistent with olfactory-cued navigation in the presence of atmospheric turbulence. Our analysis provides the strongest evidence yet for cognitive odour map navigation in wild birds. Thus, we may reconcile two highly disputed questions in movement ecology, by mechanistically connecting Lévy displacements and olfactory navigation. Our approach can be applied to any species which can be tracked at sufficient spatial resolution, using a GPS logger.

scholarly journals Niche Partitioning of Feather Mites within a Seabird Host, Calonectris borealis

PLoS ONE ◽  
2015 ◽  
Vol 10 (12) ◽  
pp. e0144728 ◽  
Author(s):  
Laura M. Stefan ◽  
Elena Gómez-Díaz ◽  
Eric Elguero ◽  
Heather C. Proctor ◽  
Karen D. McCoy ◽  
...  
Keyword(s):  
Niche Partitioning ◽  
Feather Mites ◽  
Calonectris Borealis

scholarly journals Feral pigeons as a nest competitor for a small seabird

2021 ◽  
Author(s):  
Beneharo Rodríguez ◽  
Airam Rodríguez ◽  
Felipe Siverio ◽  
Juan Manuel Martínez ◽  
Enrique Sacramento ◽  
...  
Keyword(s):  
Breeding Success ◽  
Columba Livia ◽  
Pathogen Transmission ◽  
Nest Density ◽  
Nest Location ◽  
Nest Sites ◽  
Breeding Failure ◽  
Nesting Sites ◽  
Calonectris Borealis

Abstract Due to their life-history traits, the petrels are particularly sensitive to predation by introduced species. Therefore, many populations have constricted their original breeding distribution range, currently only occupying predator-free sites. In this scenario, interspecific competition for nesting sites can be detrimental for the petrel’ conservation. Here, we evaluate how the presence of introduced mammals (cats Felis catus and rats Rattus spp.) and potential competitors for nest sites (Cory’s shearwaters Calonectris borealis and feral rock pigeons Columba livia) shape the distribution, breeding density, and breeding performance of the Bulwer’s petrel Bulweria bulwerii on Tenerife, the largest and most densely populated of the Canary Islands. We estimated nest density, assessed the role of nest location and nest characteristics on breeding success, and determined causes of breeding failure by exotic predators and competitors. Nest density was higher in predator-free colonies on marine rocks. Cat presence was the best predictor for nest density, while presence or abundance of competitors had no correlation to nest density. Breeding success varied between years and colonies, but was not related to nest characteristics. Of the unequivocally determined causes of breeding failure, pigeon competition for nests was the most frequent (7.3%), followed by rat predation (6.3%). We also compared petrel and pigeon nest cavities and found a considerable overlap in nesting niche. Our study provides insight on an overlooked impact of the invasive rock pigeon: nest competition with small seabirds. We encourage more research on the effects of pigeons on nest density, disease and pathogen transmission, and vegetation changes within petrel colonies.

scholarly journals Breeding of Cory's shearwater Calonectris borealis on Selvagem Grande and beneficial effects of removal of invasive mammals

Oryx ◽  
2021 ◽  
pp. 1-8
Author(s):  
F. Zino ◽  
M. Biscoito ◽  
A. Buckle
Keyword(s):  
Oceanic Islands ◽  
European Rabbit ◽  
House Mice ◽  
Annual Fluctuation ◽  
Predatory Behaviour ◽  
Beneficial Effects ◽  
Nest Sites ◽  
Cory’S Shearwater ◽  
Invasive Mammals ◽  
Calonectris Borealis

Abstract The largest colony of Cory's shearwater Calonectris borealis nests on the island of Selvagem Grande in the north-eastern Atlantic. In 2002, a programme of eradication was conducted to remove two alien invasive mammals, the house mouse Mus musculus and European rabbit Oryctolagus cuniculus. Preliminary studies recorded beneficial effects of the eradications for a variety of plant and animal species, including Cory's shearwater. We recorded fledging rates of shearwaters for 1982–2001, prior to the eradication, and for 2002–2020, after the eradication, from two quadrats, each containing 134–329 nest sites. Although there was annual fluctuation in fledging rates in the quadrats, the mean rate of 40.74 ±SD 3.92 fledglings per 100 nest sites for the two quadrats combined prior to the eradication of mammals increased significantly, to 52.88 ± SD 5.03 per 100 nest sites, after the eradications. Because the two mammals were removed synchronously it is difficult to know which factors depressed fledging of Cory's shearwaters on Selvagem Grande. However, the predatory behaviour of house mice on other oceanic islands, and the fact that increased fledging was seen soon after the eradications occurred, suggest predation by house mice on shearwater hatchlings was the main cause of losses.

Do Cory’s Shearwaters Calonectris borealis choose mates based on size?

2014 ◽  
Vol 155 (4) ◽  
pp. 869-875 ◽  
Author(s):  
Cristina Perry Nava ◽  
Sin-Yeon Kim ◽  
Maria Carvalho Magalhães ◽  
Verónica Neves
Keyword(s):  
Calonectris Borealis

Low spatial overlap between foraging shearwaters during the breeding season and industrial fisheries off the west coast of Portugal

2021 ◽  
Vol 657 ◽  
pp. 209-221
Author(s):  
JM Pereira ◽  
JA Ramos ◽  
AM Marques ◽  
FR Ceia ◽  
L Krüger ◽  
...  
Keyword(s):  
Breeding Season ◽  
Prey Availability ◽  
Resource Depletion ◽  
Fishing Effort ◽  
Population Variation ◽  
Breeding Period ◽  
Spatial Overlap ◽  
Cory’S Shearwater ◽  
Fishing Vessels ◽  
Calonectris Borealis

Fisheries have impacted seabird populations worldwide, either via bycatch mortality or resource depletion. Understanding the overlap between seabird distributions and fisheries is an important element for bycatch risk assessment, though the drivers of variation in seabird-fishery overlap are not well understood for some seabird populations. Here, we quantified the spatial overlap between foraging Cory’s shearwaters Calonectris borealis during the breeding season and commercial fisheries operating within the Portuguese Exclusive Economic Zone. In addition, we evaluated whether overlap varied as a function of an individual’s boldness, sex or breeding stage. For this, we GPS tracked 361 foraging trips by 72 Cory's shearwaters nesting at Berlenga Island, Portugal, over 5 consecutive breeding seasons (2012-2016). Simultaneously, we used fishing effort data from Global Fishing Watch detailing the distribution of industrial fisheries within the temporal and spatial range of Cory's shearwater tracks. Although fishing vessels were present during 88.1% of foraging trips, Cory's shearwaters spent only on average 13.3% of the time foraging in the same areas as fisheries. Such low spatial overlap is likely driven by high prey availability near the colony and suggests low direct competition for resources. We also found variation in overlap with fisheries across the breeding period, with Cory's shearwaters spending approximately 11% more time foraging in the same areas as fixed gear and purse seine vessels during pre-laying than during chick-rearing. Surprisingly, no sex or boldness-related differences were found in the overlap with any fishing gear. Our findings have implications for understanding within population variation in the overlap between fisheries and seabirds and, in turn, bycatch risk.

Two new species of nasal mites of the genus Rhinonyssus (Acari, Mesostigmata, Rhinonyssidae) from shearwaters

2022 ◽  
Author(s):  
Silvia Bainy Gastal ◽  
Carolina Silveira Mascarenhas ◽  
Leandro Bugoni
Keyword(s):  
New Species ◽  
Respiratory System ◽  
Marine Birds ◽  
Cory’S Shearwater ◽  
The Family ◽  
Two New Species ◽  
Calonectris Borealis ◽  
Manx Shearwater ◽  
General Appearance

Nasal mites of the family Rhinonyssidae are parasites living in the respiratory system of birds. To date there were no record of these mites from representatives of the order Procellariiformes, a numerous grouping of exclusively marine birds that includes albatrosses, petrels, storm-petrels and shearwaters. The paper describes two new species of the genus Rhinonyssus from shearwaters (Procellariidae) found on various shores of Brazil: Rhinonyssus borealis sp. nov. from Calonectris borealis (Cory’s shearwater) and R. procellaricus sp. nov. from Puffinus puffinus (Manx shearwater) and Ardenna gravis (Great shearwater). Both described mites are characterized by a large elliptical body and a relatively large and strongly sclerotized with the well-developed caudal extension. Rhinonyssus borealis sp. nov. and R. procellaricus sp. nov. are similar in their general appearance to each other but differ in the size of idiosoma, shape of podosomal and sternal shields and leg chaetotaxy.

A geolocator-tagged fledgling provides first evidence on juvenile movements of Cory’s Shearwater Calonectris borealis

Bird Study ◽  
2019 ◽  
Vol 66 (2) ◽  
pp. 283-288
Author(s):  
Raül Ramos ◽  
Virginia Morera-Pujol ◽  
Marta Cruz-Flores ◽  
Sofía López-Souto ◽  
Michael Brothers ◽  
...  
Keyword(s):  
Cory’S Shearwater ◽  
Calonectris Borealis
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